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https://issues.apache.org/jira/browse/HBASE-21075?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16595829#comment-16595829
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Duo Zhang commented on HBASE-21075:
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OK, maybe a external tool, that write a special file on zk, and when master
think it is safe to quit then it quits. The tool will also monitor the status
of master, if the master quits, it will check the proc wals to see if there are
outstanding unsupported procedures. If not, will output a message to say that
it is safe to upgrade, otherwise you should restart from the beginning and try
again.
> Confirm that we can (rolling) upgrade from 2.0.x and 2.1.x to 2.2.x after
> HBASE-20881
> -------------------------------------------------------------------------------------
>
> Key: HBASE-21075
> URL: https://issues.apache.org/jira/browse/HBASE-21075
> Project: HBase
> Issue Type: Sub-task
> Components: amv2, proc-v2
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Priority: Blocker
> Fix For: 2.1.1, 2.0.3
>
> Attachments: HBASE-21075.patch
>
>
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